Advancing Design of Compton Beam Monitor at ELI-NP

Abstract

The Extreme Light Infrastructure-Nuclear Physics (ELI-NP) is a new Research Infrastructure of pan-European interest and part of the European ESFRI Roadmap. Compton beam monitor is to be built at the facility to monitor gamma beam.Spectrum for different Compton scattering setup was measured, comparison of scattering cross section of different elements suggests that gold is better suited to be used as Compton scattering target at ELI-NP. Analysis of processed spectrum shows that width of Compton scattered peak depends on horizontal angular acceptance of detector but not significantly on vertical angular acceptance of detector for given source beam profile, increasing or decreasing solid angle increases or decreases count rate but reducing horizontal acceptance angle improves resolution. Position of peak was in agreement with Compton scattering principle within error therefore a scattering angle of 310 can be used at beam monitor of ELI-NP.